package com.practice.Echo;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;


public class EchoClient {
    public void connect(String ip, int port) {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(group).channel(NioSocketChannel.class).option(ChannelOption.TCP_NODELAY, true)
                     .handler(
                             new ChannelInitializer<SocketChannel>() {
                                 @Override
                                 protected void initChannel(SocketChannel socketChannel) throws Exception {
                                     ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
                                     socketChannel.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
                                     socketChannel.pipeline().addLast(new StringDecoder());
                                     socketChannel.pipeline().addLast(new EchoClientHandler());
                                 }
                             });
            ChannelFuture future = bootstrap.connect(ip, port).sync();
            future.channel().closeFuture().sync();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        new EchoClient().connect("127.0.0.1", 8080);

    }
}
